CN112719031B

CN112719031B - Earphone shell decorative cover machining die and machining method thereof

Info

Publication number: CN112719031B
Application number: CN202011490248.2A
Authority: CN
Inventors: 刘红臣; 黎荣爱; 曾君
Original assignee: Dongguan C&i Metal Co ltd
Current assignee: Dongguan C&i Metal Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2023-03-31
Anticipated expiration: 2040-12-17
Also published as: CN112719031A

Abstract

The invention belongs to the technical field of earphone production and packaging, and particularly discloses an earphone shell decorative cover processing die and a processing method thereof.

Description

Earphone shell decorative cover machining die and machining method thereof

Technical Field

The invention belongs to the technical field of earphone production and packaging, and particularly relates to an earphone shell decorative cover processing mold and a processing method thereof.

Background

As society enters the network era, electronic products are located in corners of life, and earphones are used as media for transmitting audio, which has great influence on people of different ages, especially teenagers. Today, the earphone type is more and more popular with consumers, and the satisfaction degree of the consumers to the earphone product is determined by visual experience brought by the appearance of the earphone shell decorating cover and touch experience brought by surface smoothness.

At present, earphone dress trim cover mainly adopts CNC machine tooling's mode, carries out rough machining to raw and other materials and forms the earphone shell dress trim cover that has the corresponding appearance profile of final product, however, adopts CNC machine tooling consuming time and wasting power, and the processing cost is high, and earphone dress trim cover's plane degree is difficult to obtain guaranteeing, and the wastrel phenomenon that processing appears is serious, has increased the use cost of material, can't satisfy the demand of high quality and quick production.

Disclosure of Invention

The invention aims to: aiming at the defects of the prior art, the processing method of the earphone shell decorative cover is provided, and the processing method has the effects of one-time injection molding, ensuring the plane flatness of the earphone shell decorative cover and improving the production efficiency.

In order to achieve the purpose, the invention adopts the following technical scheme:

the machining die for the earphone shell decorative cover comprises a punch, wherein the punch is used for blanking a product; the lower template is provided with a through hole; the first insert comprises a first base body and a second base body which moves along the radial direction of the first base body, the second base body is used for processing and forming a product, and the first insert is provided with a first fixing hole which is matched and connected with the punch; a plurality of second inserts are arranged around the first insert; the lower module is embedded in the through hole and corresponds to the first insert;

the first insert, the plurality of second inserts and the lower module form a first forming cavity, the first forming cavity is used for processing and forming products, and the contact surfaces of the first insert, the plurality of second inserts and the lower module and finished products are subjected to fine engraving treatment respectively.

Further, an earphone shell dress trim cover mold processing still includes: the upper die base is fixedly arranged on the machine tool and is used for being fixedly connected with the machine head of the machine tool; the upper base plate is fixedly arranged at the lower end of the upper die base and is used for cushioning the punch head to prevent the punch head from moving upwards; the upper clamping plate is fixedly arranged at the lower end of the upper base plate and is used for fixing the punch; the stripper plate is arranged below the upper clamping plate and used for guiding the punch to realize material pressing and stripping; the stop plate is fixedly arranged on the upper end surface of the stripper plate and is used for fixing the first insert; the lower base plate is fixedly arranged on the lower end face of the lower template and is used for padding the lower template, the second insert and the lower module; the lower die base is fixedly arranged at the lower end of the lower backing plate and fixedly arranged on a machine tool workbench.

Further, the surfaces of the lower template, the first insert, the second insert and the lower module adopt a heat treatment process, and the heat treatment is performed until the Rockwell hardness HRC is 58-60 degrees.

Further, the lower template, the first insert, the second insert and the lower module are processed by slow-moving wires.

Furthermore, the through holes comprise a first through hole and a second through hole, the second through holes are multiple, the second through holes are arranged around the first through hole, and the first through hole is communicated with the second through holes to form a first accommodating cavity.

Further, the lower module is arranged in the first through hole.

Further, the first insert includes a first base and a second base radially moved by the first base, the second base being used for product forming.

A processing method of an earphone shell decoration cover comprises the following steps:

step (1): selecting a decorative cover material of the earphone shell;

step (2): selecting an earphone shell decorative cover processing mold for material punch forming;

and (3): carrying out surface heat treatment and sand blasting preoxidation treatment on the stamping forming product, processing the bottom surface of the stamping forming product into a high-gloss mirror surface, and processing an inclined plane on the edge of the high-gloss mirror surface;

and (4): the product adopts a slow-feeding silk thread processing technology to cut and punch the residual rim charge;

and (5): the highlight mirror surface of the product adopts laser engraving to process a marking picture;

and (6): processing the surface of the product by adopting a mirror surface discharge processing technology;

and (7): and (4) carrying out a polishing treatment process on the product to reduce the surface roughness of the product.

Furthermore, the mould material is SKD11 mould steel, the earphone shell decoration cover material is aluminum alloy or high-quality steel.

Furthermore, a plurality of third through holes formed by laser etching are uniformly distributed on the highlight mirror surface, the diameter of each third through hole is 0.05-0.15mm, and the plurality of third through holes are used for uniformly transmitting light rays.

The invention has the beneficial effects that: according to the machining die and the machining method for the earphone shell decorative cover, the lower die plate, the first insert, the second insert and the lower die block are designed, wherein the second inserts are arranged in a plurality of numbers and are arranged around the first insert, the second inserts are tightly matched with the first insert, the problem of gaps caused by tight matching between the machining die and a blank is effectively solved, the contact surfaces of the first inserts, the second inserts and the lower die block with a finished product are subjected to engraving treatment, the flatness and the surface smoothness of the machined product are improved, the occurrence of defective products is effectively reduced, the machining cost is reduced, meanwhile, the appearance of the earphone shell decorative cover is subjected to one-step stamping forming, the machining efficiency of the earphone shell decorative cover is effectively improved, CNC machining is not needed, the equipment purchasing cost is effectively reduced, the machining die is a continuous die, the machining die can be machined for multiple times, the surface smoothness of the machined product is high, the surface flatness of the machined product can be guaranteed, and the requirements of high-quality and rapid production are met.

Drawings

Fig. 1 is a schematic view of a structure of an earphone shell decoration cover;

fig. 2 is a schematic structural view of a mold for processing a decorative cover of an earphone shell according to the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

fig. 4 is a second schematic structural view of a mold for processing a decorative cover of an earphone shell according to the present invention;

fig. 5 is a third schematic structural view of a mold for processing a decorative cover of an earphone shell according to the present invention;

fig. 6 is a fourth schematic structural view of a mold for processing a decorative cover of an earphone shell according to the present invention;

fig. 7 is a schematic structural view of a lower template of the earphone shell decoration cover processing mold according to the present invention;

fig. 8 is a schematic structural view of a first insert of a mold for processing a decorative cover of an earphone shell according to the present invention.

Wherein:

1-a punch;

2-a lower template; 21-a through hole; 211 — a first via; 212-a second via; 22-a first volume;

3-a first insert; 31-a first substrate; 32-a second substrate;

4-a second insert; 5-lower module; 6-an upper die holder; 7-upper cushion plate; 8-upper splint; 9-stripping plate; 10-a stopper plate; 11-lower backing plate; 12-a lower die holder; 13-lower cushion block; 14-spring hole; 15-sleeve hole; 16-pin combining holes; 17-counter sink; 18-inner guide post; 19-earphone shell decorating cover.

Description of the preferred embodiment

As used in this specification and the appended claims, certain terms are used to refer to particular components, and it will be appreciated by those skilled in the art that a manufacturer may refer to a component by different names. The description and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The present invention will be described in further detail with reference to the following drawings and specific examples, but the present invention is not limited thereto.

Examples

As shown in fig. 1 to 7, the die for processing the earphone shell decorative cover comprises a punch 1, wherein the punch 1 is used for punching a product; the punch 1 is arranged on a stamping die to perform continuous blanking, stamping and punching-off operation, so that the processed material is separated or plastically deformed, and the appearance of the earphone shell decorating cover is required. The lower template 2 is provided with a through hole 21, and the upper end surface of the lower template 2 is provided with a vacancy avoiding position, so that the interference in assembling is effectively reduced, the die matching is better, meanwhile, the unnecessary complex processing of the upper end surface of the lower template 2 is reduced, and the production and processing difficulty of the lower template 2 is reduced; a first insert 3; a plurality of second inserts 4 are arranged, and the plurality of second inserts 4 are arranged around the first insert 3; the lower module 5 is embedded in the through hole 21, and the lower module 5 corresponds to the first insert 3; the structural design ensures that the processing mould has compact structure, reduces the occupied space of the processing mould and ensures the normal production of the processing mould.

The first insert 3, the plurality of second inserts 4 and the lower module 5 form a first molding cavity, the first molding cavity is used for processing and molding a product, and the contact surfaces of the first insert 3, the plurality of second inserts 4 and the lower module 5 with the finished product are subjected to fine engraving treatment. The surface is processed by the accurate carving, so that the problem of increased accumulated error after the die is assembled is effectively reduced, the surface quality of a punch forming product is ensured, the surface smoothness and the flatness are improved, and the processing requirement is met.

Preferably, an earphone shell dress trim mold processing still includes: the upper die base 6 is fixedly arranged on the machine tool, and the upper die base 6 is fixedly connected with the machine head of the machine tool; the upper padding plate 7 is fixedly arranged at the lower end of the upper die holder 6, and the upper padding plate 7 is used for padding the punch 1 to prevent the punch 1 from moving upwards; the upper clamping plate 8 is fixedly arranged at the lower end of the upper backing plate 7, and the upper clamping plate 8 is used for fixing the punch 1; the stripper plate 9 is arranged below the upper clamping plate 8, and the stripper plate 9 is used for guiding the punch 1 to realize material pressing and stripping; the stop plate 10 is fixedly arranged on the upper end face of the stripper plate 9, and the stop plate 10 is used for fixing the first insert 3; the lower cushion plate 11 is fixedly arranged on the lower end face of the lower template 2, and the lower cushion plate 11 is used for cushioning the lower template 2, the second insert 4 and the lower module 5; the lower die holder 12, lower die holder 12 fixed mounting are on 11 lower extremes of lower bolster and 12 fixed mounting of lower bolster on the lathe workstation, and lower cushion 13, lower cushion 13 are fixed to be set up in 12 lower extremes of lower bolster, play the cushioning effect, avoid the damage to the workstation among the stamping process. The structural design ensures that the processing die can continuously operate, improves the matching precision of the processing die under the matching of the templates, ensures the orderly processing of processing procedures, realizes the operations of quick material pressing and material stripping, is simple to operate, has accurate positioning between the punch 1 and the lower template 2, effectively improves the stability of the die, reduces the adjusting time of an operator, is convenient to replace the modules, and effectively lightens the labor intensity.

Wherein, a plurality of spring holes 14 of having evenly arranged, a plurality of cover barrel holes 15, a plurality of pinhole and a plurality of counter bore 17 etc. close, a one-to-one sets up between its position, be used for direction and fixed mould, improve the cooperation precision of mold processing, punch holder 8, take off flitch 9, backstop board 10, realize accurate positioning through a plurality of interior guide posts 18 between lower bolster 11 and the die holder 12, interior guide post 18 is used for the direction, improve the rapidity of mold processing equipment, accurate direction, be favorable to the cooperation between each chunk of mold processing, improve its cooperation precision, the earphone shell dress trim cover that makes production satisfies the processing requirement.

Preferably, the surfaces of the lower template 2, the first insert 3, the second insert 4 and the lower module 5 adopt a heat treatment process, and the heat treatment is performed to obtain Rockwell hardness HRC of 58-60 degrees. The heat treatment comprises a preliminary heat treatment and a final heat treatment, wherein the preliminary heat treatment improves the processing performance and stress relief of the lower template 2, the first insert 3, the second insert 4 and the lower die block 5 and prepares a good metallographic structure for the final heat treatment; through final heat treatment, the mechanical properties such as hardness, wear resistance and strength of the lower template 2, the first insert 3, the second insert 4 and the lower die block 5 are improved, and the service life of the processing die is effectively prolonged.

Preferably, the lower template 2, the first insert 3, the second insert 4 and the lower module 5 are processed by slow-wire. The low-speed wire-moving machining uses a continuously moving fine metal wire (called as a wire electrode) as an electrode, performs pulse spark discharge to remove metal on a workpiece, and performs cutting forming to obtain a lower template 2, a first insert 3, a second insert 4 and a lower module 5 which meet the machining precision requirement, the wire electrode performs low-speed unidirectional motion, the wire-moving speed is lower than 0.2mm/s, the precision reaches 0.001mm level, the wire electrode is not used after discharging, the wire electrode works stably, uniformly and slightly jitters, the machining precision of the lower template 2, the first insert 3, the second insert 4 and the lower module 5 can be effectively ensured, the maximum production rate can reach 350mm ² And/min, high-speed machining is realized, meanwhile, a wire electrode continuous wire supply mode is adopted, namely the wire electrode finishes machining in the moving process, the loss of the wire electrode is effectively compensated, the machining precision of parts is effectively improved, a slow wire cutting process is adopted, the roughness of the machining surfaces of the lower template 2, the first insert 3, the second insert 4 and the lower module 5 is favorably reduced, the roundness error, the straight line error and the size error of the lower template 2, the first insert 3, the second insert 4 and the lower module 5 are reduced, the machining precision is ensured to meet the requirements, the matching precision of a machining mold is improved, and the size precision of the punch-formed earphone shell decorating cover is improved.

Preferably, the through holes 21 include a first through hole 211 and a second through hole 212, the second through holes 212 are provided in plurality, the second through holes 212 are arranged around the first through hole 211, the first through hole 211 and the second through holes 212 are communicated to form a first accommodating cavity 22, the lower module 5 is arranged in the first through hole 211, and the second inserts 4 are correspondingly arranged in the second through holes 212. This kind of structural design makes the cooperation between the individual piece of the mold processing of equipment inseparabler, at the equipment of mold processing and in-process of dismantling, realizes equipment and dismantlement operation, easy operation guarantees that the location between drift 1 and the lower bolster 2 is accurate, has effectively improved the stability of mould, reduces operator's adjustment time, is convenient for change between each module, has effectively alleviateed intensity of labour.

Preferably, the first insert 3 comprises a first base 31 and a second base 32 moved radially by the first base 31, the second base 32 being used for product forming. This kind of structural design is favorable to improving the location accuracy between first mold insert 3 and the lower bolster 2, the cooperation precision between first mold insert 3 and the lower bolster 2 has been improved, second base member 32 tip be provided with earphone shell dress trim cover appearance assorted profile and adopt 3D finishing impression to handle, the precision of second base member 32 machined surface has been improved, effectively guarantee the surface quality of the earphone shell dress trim cover of processing, guarantee its roughness and smoothness, reduce the subsequent processing of earphone shell dress trim cover, and the production efficiency is improved.

Examples

A processing method of an earphone shell decorative cover comprises the following steps:

step (1): selecting a decorative cover material of the earphone shell;

step (2): selecting the earphone shell decorative cover processing mold as defined in any one of claims 1 to 7 for material punch forming; the height deviation of the peripheral surface of the bottom surface of the earphone shell decorative cover formed by stamping is not more than 0.05mm, and the height deviation of the inner side plane is not more than 0.05mm.

And (3): carrying out surface heat treatment and sand blasting preoxidation treatment on the stamping forming product, processing the bottom surface of the stamping forming product into a high-gloss mirror surface, and processing an inclined plane on the edge of the high-gloss mirror surface; the adopted heat treatment process comprises a preliminary heat treatment and a final heat treatment, the preliminary heat treatment eliminates the internal stress of the earphone shell decorative cover and improves the processing performance of the earphone shell decorative cover, and the final heat treatment improves the mechanical properties of the earphone shell decorative cover, such as hardness, wear resistance, strength and the like.

and (7): and (3) carrying out a polishing treatment process on the product to reduce the surface roughness of the product.

Preferably, the material of the die is SKD11 die steel, and the material of the earphone shell decorative cover is aluminum alloy or high-quality steel.

Preferably, a plurality of third through holes formed by laser etching are uniformly distributed on the highlight mirror surface, the diameter of each third through hole is 0.05-0.15mm, and the plurality of third through holes are used for uniformly transmitting light rays.

Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. The utility model provides an earphone shell dress trim cover mold processing which characterized in that: comprises that

A punch (1);

the lower die plate (2), the lower die plate (2) is provided with a through hole (21);

the first insert (3) is provided with a first fixing hole which is matched and connected with the punch head (1), the first insert (3) comprises a first base body (31) and a second base body (32) which moves along the radial direction from the first base body (31), and the second base body (32) is used for processing and forming a product;

the plurality of second inserts (4) are arranged, the plurality of second inserts (4) are arranged around the first insert (3) and are embedded in the through hole (21);

the lower module (5) is embedded in the through hole (21), and the lower module (5) is arranged corresponding to the first insert (3);

the upper die holder (6) is fixedly arranged on the machine tool, and the upper die holder (6) is fixedly connected with the machine head of the machine tool;

the upper base plate (7) is fixedly arranged at the lower end of the upper die holder (6), and the upper base plate (7) is used for cushioning the punch (1) to prevent the punch (1) from moving upwards;

the upper clamping plate (8), the upper clamping plate (8) is fixedly arranged at the lower end of the upper base plate (7), and the upper clamping plate (8) is used for fixing the punch (1);

the stripper plate (9) is arranged below the upper clamping plate (8), and the stripper plate (9) is used for guiding the punch (1) to realize material pressing and stripping;

a stop plate (10), wherein the stop plate (10) is fixedly arranged on the upper end surface of the stripper plate (9), and the stop plate (10) is used for fixing the first insert (3);

the lower cushion plate (11) is fixedly arranged on the lower end face of the lower template (2), and the lower cushion plate (11) is used for cushioning the lower template (2), the second insert (4) and the lower module (5);

the lower die holder (12), the said lower die holder (12) is fixedly mounted to the lower end of the said lower tie plate (11) and the said lower die holder (12) is fixedly mounted to the lathe work level;

the first insert (3), the plurality of second inserts (4) and the lower module (5) form a first molding cavity, the first molding cavity is used for processing and molding a product, and the contact surfaces of the first insert (3), the plurality of second inserts (4) and the lower module (5) and the finished product are subjected to fine engraving respectively.

2. The earphone shell decorative cover processing mold according to claim 1, wherein: the surfaces of the lower template (2), the first insert (3), the second insert (4) and the lower module (5) adopt a heat treatment process, and the heat treatment is HRC 58-60 degrees in Rockwell hardness.

3. The earphone shell decorative cover processing mold according to claim 1, wherein: the lower template (2), the first insert (3), the second insert (4) and the lower module (5) are processed by slow-speed wire.

4. The earphone shell decorative cover processing mold according to claim 1, wherein: the through hole (21) comprises a first through hole (211) and a second through hole (212), the second through hole (212) is provided with a plurality of through holes, the second through hole (212) surrounds the first through hole (211), and the first through hole (211) is communicated with the second through hole (212) to form a first accommodating cavity (22).

5. The earphone shell decorative cover processing mold according to claim 4, wherein: the lower module (5) is arranged in the first through hole (211), and the second inserts (4) are correspondingly arranged in the second through holes (212).

6. A processing method of a headphone shell decoration cover is characterized by comprising the following steps:

step (1): selecting a decorative cover material of the earphone shell;

step (2): selecting the earphone shell decorative cover processing mold as claimed in any one of claims 1 to 5 for material punch forming;

and (3): carrying out surface heat treatment and sand blasting preoxidation treatment on the punch forming product, processing the bottom surface of the punch forming product into a high-gloss mirror surface, and processing an inclined plane on the edge of the high-gloss mirror surface;

7. The processing method of the earphone shell decorative cover of claim 6, wherein: the mould material is SKD11 mould steel, earphone shell decoration cover material is aluminum alloy or high-quality steel.

8. The processing method of the earphone shell decorative cover of claim 6, wherein: a plurality of third through holes formed by laser etching are uniformly distributed on the highlight mirror surface, the diameter of each third through hole is 0.05-0.15 mm, and the third through holes are used for uniformly transmitting light.